/**
 * ***************************************************************************** Copyright (c) 2000,
 * 2008 IBM Corporation and others. All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0 which accompanies this
 * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * <p>Contributors: IBM Corporation - initial API and implementation
 * *****************************************************************************
 */
package org.eclipse.jdt.internal.corext.refactoring.code.flow;

class SwitchFlowInfo extends FlowInfo {
  private GenericConditionalFlowInfo fCases;
  private boolean fHasNullCaseInfo;

  public SwitchFlowInfo() {
    fCases = new GenericConditionalFlowInfo();
  }

  public void mergeTest(FlowInfo info, FlowContext context) {
    if (info == null) return;
    mergeSequential(info, context);
  }

  public void mergeCase(FlowInfo info, FlowContext context) {
    if (info == null) {
      fHasNullCaseInfo = true;
      return;
    }
    fCases.mergeConditional(info, context);
  }

  public void mergeDefault(boolean defaultCaseExists, FlowContext context) {
    if (!defaultCaseExists || fHasNullCaseInfo) fCases.mergeEmptyCondition(context);
    mergeSequential(fCases, context);
  }
}
